Hi. I have a 2002 Cadillac STS. There are no current codes shown on my scanner. I start the car, no lights come on. I hear the stability pump activate. When I press the brake peddle, I get "service stability control" message on the dash display. When that comes on, the ABS and TC light come on, and both systems are deactivated. No codes for either are shown. EBCM has been rebuilt already and is fine. If shocks are the problem, are the systems deactivated? can I purchase aftermarket regular shocks, and what has to be done to install them.